Last Week in AI #251 - Mythos Back, Sonnet 5, Etched, LongCat

Anthropic has released Sonnet 3.5, and the incoming U.S. administration has removed previous restrictions regarding the company's collaboration with government agencies. Additionally, Google has introduced new features for NotebookLM, while hardware companies Etched and Baidu have announced updates concerning their specialized AI chip development. These developments reflect ongoing shifts in federal AI policy and a continued focus on both software model iteration and custom infrastructure.